We can’t be the only ones that swipes through every single app when we want to clear the recently used apps section. Well there is another way, by installing the apk below you will find a button in the top left corner of ‘Recent apps’ that will allow you to close all of your open apps in one click. This was modified from the Japanese Xperia Z (SO-02E), which natively included the feature.
The app works on the Xperia Z, Z1, Z Ultra, ZR, and ZL, but it may also work on other Xperia handsets too. The app does not require root either. To install, download the apk below and install it as you would any other third-party app. Restart your phone and once you’ve opened a few apps, you should notice the ‘Close all’ button appear. It’s as simple as that.